Identification
A long black day is followed by a second long black day that gaps in the direction of the trend. The third day is white and opens within the body of the second day and closes within the gap.

The Psychology
In a downtrend a gap is partially filled. This is simply a profit taking scenario for the shorts and a sucker entry for dumb longs. We have a weak stock in a downtrend that bounces. As long as the white day is on lighter volume, the bears will most likely retake control soon after.

I wouldn't exactly say this is a good example of a Downside Tasuki Gap candle because I'd put it in the category of candle formations that form by happenstance. ANF was going nowhere with no clear trend, but nevertheless it does give the reader a glimpse at was this type of pattern could look like.